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Outline
In order to study the influence of dynamic obstacles on mine wind speed, four influencing factors of roadway inlet wind speed, mine car driving speed, mine car length and blocking ratio were selected when the mine car was driving in the transportation roadway. The dynamic grid technology was used for numerical simulation, and the variation law of the influence of different factors on the roadway wind flow was obtained. The results show that the greater the difference between the inlet wind speed of the roadway and the driving speed of the mine car, the more obvious the average wind speed change of the cross section of the roadway, and the longer the interference distance of the mine car to the wind flow of the roadway, which greatly affects the stability of mine ventilation system. The mine car length and the blocking ratio have little effect on the stability of the mine ventilation system. Using the stepwise linear regression analysis method in SPSS software, the influence of four influencing factors on the change degree of roadway wind speed from strong to weak is mine car driving speed, roadway inlet wind speed, blocking ratio and mine car length. The research results are of great significance to maintaining the stability of mine ventilation system.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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